LU-14927 quota: move qsd_transfer to lquota module

[fs/lustre-release.git] / lustre / quota / qsd_handler.c

diff --git a/lustre/quota/qsd_handler.c b/lustre/quota/qsd_handler.c
index ea75142..1c8e43a 100644 (file)
--- a/lustre/quota/qsd_handler.c
+++ b/lustre/quota/qsd_handler.c
@@ -1136,6 +1136,72 @@ void qsd_op_end(const struct lu_env *env, struct qsd_instance *qsd,
 }
 EXPORT_SYMBOL(qsd_op_end);
 
+/* Simple wrapper on top of qsd API which implement quota transfer for osd
+ * setattr needs. As a reminder, only the root user can change ownership of
+ * a file, that's why EDQUOT & EINPROGRESS errors are discarded
+ */
+int qsd_transfer(const struct lu_env *env, struct qsd_instance *qsd,
+                struct lquota_trans *trans, unsigned int qtype,
+                u64 orig_id, u64 new_id, u64 bspace,
+                struct lquota_id_info *qi)
+{
+       int rc;
+
+       if (unlikely(!qsd))
+               return 0;
+
+       LASSERT(qtype < LL_MAXQUOTAS);
+       if (qtype == PRJQUOTA)
+               if (!projid_valid(make_kprojid(&init_user_ns, new_id)))
+                       return -EINVAL;
+
+       qi->lqi_type = qtype;
+
+       /* inode accounting */
+       qi->lqi_is_blk = false;
+
+       /* one more inode for the new owner ... */
+       qi->lqi_id.qid_uid = new_id;
+       qi->lqi_space = 1;
+       rc = qsd_op_begin(env, qsd, trans, qi, NULL);
+       if (rc == -EDQUOT || rc == -EINPROGRESS)
+               rc = 0;
+       if (rc)
+               return rc;
+
+       /* and one less inode for the current id */
+       qi->lqi_id.qid_uid = orig_id;
+       qi->lqi_space = -1;
+       /* can't get EDQUOT when reducing usage */
+       rc = qsd_op_begin(env, qsd, trans, qi, NULL);
+       if (rc == -EINPROGRESS)
+               rc = 0;
+       if (rc)
+               return rc;
+
+       /* block accounting */
+       qi->lqi_is_blk = true;
+
+       /* more blocks for the new owner ... */
+       qi->lqi_id.qid_uid = new_id;
+       qi->lqi_space = bspace;
+       rc = qsd_op_begin(env, qsd, trans, qi, NULL);
+       if (rc == -EDQUOT || rc == -EINPROGRESS)
+               rc = 0;
+       if (rc)
+               return rc;
+
+       /* and finally less blocks for the current owner */
+       qi->lqi_id.qid_uid = orig_id;
+       qi->lqi_space = -bspace;
+       rc = qsd_op_begin(env, qsd, trans, qi, NULL);
+       /* can't get EDQUOT when reducing usage */
+       if (rc == -EINPROGRESS)
+               rc = 0;
+       return rc;
+}
+EXPORT_SYMBOL(qsd_transfer);
+
 /**
  * Trigger pre-acquire/release if necessary.
  * It's only used by ldiskfs osd so far. When unlink a file in ldiskfs, the